JSFiddle - React, Tailwind, and code Playground

HTML

<div class="photo_loader">
            <span class="loadertext">Передняя сторона</span>
            <div class="upload_btn">Прикрепить файл</div>
            <div class="files">
                <div class="file">
                    <span class="file_name">Foto.jpg</span>
                    <a href="#" class="delete_file">удалить</a>
                </div>
            </div>
        </div>

CSS

.upload_btn_hovered { color: red; }

JavaScript

$(document).ready(function(){
  $('a.delete_file').click(function(){

    var $btn = $(this).parents('.photo_loader').find('.upload_btn');
    
    $(this).parent().remove();
    
    if( $('.files').children().length > 0) {
      $btn.removeClass('upload_btn_hovered');
    } else { 
    	$btn.addClass('upload_btn_hovered');
    }

  });
});